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0. GULDNER.

HOT AIR ROTARY MOTOR.

No. 249,882. Patented Nov. 22,1881.

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HOT AIR ROTARY MOTOR.

No. 249,832. Patented Nov. 22,1881.

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OSlVALD GULDNER, OF NOSSEN, SAX'ONY, GERMANY.

HOT-Al R ROTARY MOTOR.

SPECIFICATION forming part of Letters Patent No. 249,832, dated November22, 1881.

Application filed April 25, 1881. (No model.) Patented in GermanyDecember .29, 1880.

1'0 all whom it may concern Be it known that 1, OSW'ALD GULDNER, of thecity of Nossen, Saxony, in the Empire of Germany, have invented a newand useful Improvement in Hot-Air Rotary Motors, of which the followingis the specification.

The nature of my invention consists in the arrangement of a hollow wheelor drum divided into a number of chambers, each of which is providedwith a suitable piston or plunger acting upon a stationary sector,thereby turning said wheel or drum, which motion is communicated tothedriving-shaft. During the revolution of the wheel or drum the chambersin the same, which are filledwith a suitable fluid or gas, passalternately the boiler, fire, or other heating medium and asuitablecooling arrangement, whereby the fluid or gas in said chamber isalternately heated and expanded or cooled and contracted, causing by itsexpansion the outward motion or propulsion of its plunger or piston,which latter, when the fluid or gas is again cooled and contracted,moves again inward into said chamber either by the atmospheric pressureor by means of suitable springs.

In the accompanying drawings, Figure 1 represents a side view of mymotor, partly in section. Fig. 2 is an end view of thesame. Figs. 3 and4 are details.

Similar letters represent similar part-s.

D is a hollow wheel or drum, divided by the division-plates d into anumber of chambers, D, (not less than three,) each of which is providedwith a 1 suitable piston or plunger, P, passing through the inner ends,d, between suitable flexible packing, i, and attached to slides 8,having one or more projecting teeth, 1'. The plun gersl? are arrangedalternately on and the other side of the center line of the drum D, andthe slides s are guided in suitable grooves in the ring R, attached tothe inner periphery of the drum P, so as to allow the teeth 1' toproject inward. These teeth 1' act upon a stationary sector, S, attachedto the supports or frames B B, which latter support the driving-shaft G.The drum D is attached by means of suitable flanges, h, to a wheel, A,fastened upon the shaft 0. The outer periphery of the wheel or drum D ismade circular to increase its surface, against which a suitable furnace,K, is fitted, through which, either by the direct application of itsfire or .by the action of any suitable me dium heated by the fire insaid furnace, the contents of said chambers D will be heated.

O is a chamber. to contain cold water, and through which the wheel ordrum D is made to pass for the purpose of cooling off said chambers andtheir contents. The chambers D of the wheel or drum D are filled witha'suitable fluid or gas which easily expands by the application of heat,and easily contracts again by the application of a cold medium. When thechamber D passes the boiler or heating arran gement K the fluid or gascontained therein will expand, forcing thereby the piston or plunger Poutward, which action, on account of its teeth 0' being engaged with theteeth on the stationary sector S, causes the drum or wheel D to turn,and consequently the wheel A and shaft 0. When the chamber D, in thecourse of its revolution, passes through the cooling medium con tainedin the chamber 0, said chamber, and consequently the fluid or gascontained therein, will be cooled off and said fluid or gas willcontract, when the piston or plunger P will move again into said chambereither by the atmospheric pressure or by means of suitable springs, to,arranged forthat purpose, as shown in Fig. 3.

The plungers P are slightly bent to correspond to their relativeposition during their motion, and may be lined or filled with a suitablenon-conducting substance. The plungers P are, as before stated, arrangedalternately on the one and the other side of the center line of thedrum, wheel, or chambers, and are so arranged that the forward end oftwo of their slides s or teeth shall not be more than about one andone-half inch from each other, (see Fig.3,) whereby the dead centerorpoint where there is no action against the sectorS from one of theplungers will be reduced to about one half of the pitch of the teeth insaid sector.

To prevent any accident from the bursting of the chambers, the wheel Wupon the shaft 0, and from which the motion is transferred, is arrangedbetween two collars, n and m, keyed fast upon the shaft 0. The hub ofthe wheel W is provided with cavities, (see Fig. 4,) into which conicalends of keys 0 e, passing through the collar m, fit, and held inposition by means of a suitable spring, o. ance is too great these keys6 e are forced out Whenever the resistof the cavities, and the wheel Wwill stop,while the drum D and shaft 0 can revolve freely.

Instead of causing the wheel or drum D to revolve, the same may bearranged to remain stationary and substituting a wheel in place of thesector S, which must in that case be firmly attached to the shaft; and,instead of placing the wheel or drum D upright, the same can be placedhorizontal and made stationary, andtheheatingandcooling apparatusattached to the shaft and carried around with the same. At the same timetwo or more heating and coolin g apparatuses arranged alternately may bearranged around the circumference of the wheel D, whereby the effectwill be increased.

